Canto XXXSuddenly, two spirits – Gianni Schicchi de' Cavalcanti and Myrrha, both punished as Imposters (Falsifiers of Persons) – run rabid through the pit. Schicchi sinks his teeth into the neck of an alchemist, Capocchio, and drags him away like prey. Griffolino explains how Myrrha disguised herself to commit incest with her father King Cinyras, while Schicchi impersonated the dead Buoso Donati to dictate a will giving himself several profitable bequests. Dante then encounters Master Adam of Brescia, one of the Counterfeiters (Falsifiers of Money): for manufacturing Florentine florins of 21 (rather than 24) carat gold, he was burned at the stake in 1281. He is punished by a loathsome dropsy-like disease, which gives him a bloated stomach, prevents him from moving, and an eternal, unbearable thirst. Master Adam points out two sinners of the fourth class, the Perjurers (Falsifiers of Words). These are Potiphar's wife (punished for her false accusation of Joseph in Genesis 39:7–19[105]) and Sinon, the Achaean spy who lied to the Trojans to convince them to take the Trojan Horse into their city (Aeneid II, 57–194); Sinon is here rather than in Bolgia 8 because his advice was false as well as evil. Both suffer from a burning fever. Master Adam and Sinon exchange abuse, which Dante watches until he is rebuked by Virgil. As a result of his shame and repentance, Dante is forgiven by his guide. Sayers remarks that the descent through Malebolge "began with the sale of the sexual relationship, and went on to the sale of Church and State; now, the very money is itself corrupted, every affirmation has become perjury, and every identity a lie"[104] so that every aspect of social interaction has been progressively destroyed.

Canto XXXIDante and Virgil approach the Central Well, at the bottom of which lies the Ninth and final Circle of Hell. The classical and biblical Giants – who perhaps symbolize pride and other spiritual flaws lying behind acts of treachery[106] – stand perpetual guard inside the well-pit, their legs embedded in the banks of the Ninth Circle while their upper halves rise above the rim and are visible from the Malebolge.[107] Dante initially mistakes them for great towers of a city. Among the Giants, Virgil identifies Nimrod (who tried to build the Tower of Babel; he shouts out the unintelligible Raphèl mai amècche zabì almi); Ephialtes (who with his brother Otus tried to storm Olympus during the Gigantomachy; he has his arms chained up) and Briareus (who Dante claimed had challenged the gods); and Tityos and Typhon, who insulted Jupiter. Also here is Antaeus, who did not join in the rebellion against the Olympian gods and therefore is not chained. At Virgil's persuasion, Antaeus takes the poets in his large palm and lowers them gently to the final level of Hell.